As Pyreneola delineata (synonymous)
This species (Pyreneola delineata) has been suggested to be a junior synonym of Pyreneola abyssicola by Sleurs (1987) and of Pyreneola semipicta (Sowerby, 1894) by Monsecour and Kohler (2006). Thiele's specimens and those collected by the expedition are tall and narrow, with two rows of nested chevrons on the body whorl. Between the brown markings, at the level of the suture, there is an unpigmented spiral line flanked by opaque white spots on both sides. The photos I have of the types of P. semipicta, from Hong Kong, are stouter shells, thicker in the body whorl, with only one row of chevrons, posterior to the suture. Pyreneola abyssicola (Brazier, 1877), the type species of the genus, is also similar, but the nested chevrons vary in size, whereas those on the Ambon specimens do not; and P. abyssicola also lacks the white spots at the suture line. These species may indeed be synonymous, but because species in this poorly known genus are at this time separated by very minor differences in markings and shape, it seems preferable to maintain all three species separate for now, especially as the expedition material matches one group much more than the other. Thiele's species was collected in the Malacca Strait.